Apparatus for operating warehouse-doors



(-No Model.)

G. L. BROWNELL.

APPARATUS FOR OPERATING WAREHOUSE nouns.

Patented Mar. 24, 1885.

UNrrED STATES PATENT @rrrcii.

GEORGE LOOMIS BROVVNELL, OF WVOROESTER, MASSACHUSETTS.

APPARATUS FOR OPERATING WAREHOUSE-DOORS.

SPECIFICATION forming part of Letters Patent No. 314,219, dated March 24, 1885.

(X0 model.)

To all whom it may concern.-

Beit known that I, GEORGE LooMrs BROWN- ELL, a citizen of the United States, residing at Worcester, in the county of \Vorcester and State of Massachusetts, have invented a newand useful Improvement in Apparatus for Op crating Warehouse-Doors, of which the following is a specification, illustrated by the accompanying drawings, in which?- Figure 1 shows a perspective view; Fig. 2, an elevation with the direction of the hoisting-rope changed; and Fig. 3 shows the device adapted to a horizontally-sliding door.

Similar letters refer to similar parts in the several views.

My invention has for its objects to enable sliding doors, suclras are usually employed to allow access to elevators, to be unlocked, opened, closed, and again locked by an attendant on other stories of the building or from remote portions of the building; and it consists in a hoisting apparatus applied to the door, in a latching device operated by the hoisting apparatus, and also in the construction and arrangement of the several parts, as hereinafter set forth.

A denotesthe side of the building. a a are ways for the vertically-sliding door or gate B, counterbalanced by cords b and weights 0.

Extending transversely across the door 13 is a bar, C, pivoted at 0, having the motion of itsfree end climited by the staple d, or by pins or stops projecting from the door, and carry ing upon its upper edge the pulleys e e, and depending from its lower edge the pulleys ff.

Pivoted to the door is a bell-crank lever, D, whose horizontal arm 9 is connected by a chain or cord, 9, with the bar 0, and its vertical arm h is provided with a shoulder or hook, h, and the lever l) is so pivoted upon the door that in its normal position the shoulder h will engage the stop z projecting from the building.

Attached to the building at j is a rope, E, which is carried beneath the two pulleys e e, thence to the desired height and over and across the pulleys 74 7c, thence downward beneath and across the pulleys Z 1, over the pulleys f f, with its opposite end attached to the building at m. The portion of the rope n a in Fig. 1 is carried from the upper to the lower stories in a position inside the elevatorwell, so it may be conveniently operated by a person on the elevator.

By drawing the rope at n a downward in the direction of the arrow 1), the free end 0' of the bar-C will be raised, lifting the horizontal arm g of the lever D and disengaging the hook h from the stop i and unlocking the door. As the bar 0 is brought against the staple d, the door will be carried upward or opened. Reversing the motion of the rope at 'n n will draw the end 0 of the bar 0 downward, lowering the arm h of the lever D, and placing the hook h in position to engage the stop 2'. As the bar 0 is brought against the lower foot of the staple d the door B will be carried downward or closed, the beveled end of the hook h sliding over the stop z'and engaging the stop, securely locking the door on the inside. In Fig. 2 the rope is carried to the. right outside of the elevatorwell, passing through the floor q, and the pulleys It It and Z I may be so placed as to change the direction of the hoisting-rope as desired, carrying it through the office-room or to remote portions of the building.

In Fig. 8 substantially the same device is shown as applied to a door sliding in horizontal ways, and in which the guidingpulleys k k and Z Z are placed above the door, and instead of the hooked arm h of the lever D being vertical, as in Figs. 1 and 2, the arm 9 is the vertical arm, and should be made heavy enough to hold the hook h in position to engage the stop- 1'.

The pivoted bar 0 is preferably placed across the central section of the door, and the ends 0' and c, I extend beyond the door, so the rope E may be carried from the pulleysc e andff parallel with the ways a a.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. The combination, with a door or gate sliding in ways in a building, of a hoistingrope having its ends attached to the building and carried around pulleys on thesliding door and building, substantially as described, and for the purpose set forth.

2. The combination, with a sliding door or gate sliding in ways in a building, and a hoisting-rope having its ends attached to the building and passing around pulleys on the door nected with said pivoted bar so the mot-ion of the bar will actuate the same, as and for the purpose set forth.

4. The combination, with a sliding door sliding in Ways in a building, and a hoistingrope by which said door is operated, of a bellcrank lever pivoted to the door and connected with and actuated by the hoisting-rope, said bell-crank lever having on one arm a hook adapted to engage a stop on the building, as and for the purpose set forth.

5. The combination, with a door or gate sliding in ways in a building, of abar pivoted to said door and vibrating between stops on the door and carrying pulleys to receive ahoisting-rope, a hoisting-rope having its ends at taehed to the building and passing over the pul leys on the pivoted bar and over pulleys on the building changing the direction of the rope, and a bell-crank having one arm connected with and actuated by the pivoted bar and its other arm carrying a hook or latching device to engage a stop on the building, as and for the purpose set forth.

GEORGE LOOMIS BROWNELL.

\Vitnesses:

RUFUs BENNETT FoWLER, K. H. ELLIs. 

